Add Thor Tasks and qutil executable

* Adds Thor, and Thor tasks that can be included in other projects, or used via the 'qutil' executable.

Utility Tasks added:

* Linting: 'ruby', 'cookbook' tashs run Rubocop for ruby projects and FoodCritic for Chef projects. 'init_ruby' task initializes a project with a base organization rubocop.yml config, an a project specific rubocop.yml that inherits from it.
* Notify: 'slack' task that sends messages to Slack chatrooms.
* CI: 'notify_slack' task that build status messages from tddium ENV variables and posts to slack.